Blacklists Compared

15 June 2013

[ Fighting Spam | Dialup Zones | Blacklists Compared | Current Blacklist Comparison | Sendmail Configuration ]

Survey results for all known public IP-based DNS blacklists. Lookups were done on connecting IP addresses. The "union of most IP zones" line excludes the hostkarma.junkemailfilter.com (all results but 127.0.0.2, 127.0.0.3, and 127.0.0.4), exemptions.ahbl.org, query.bondedsender.org, list.dnswl.org, accredit.habeas.com, iadb.isipp.com, iadb2.isipp.com, swl.spamhaus.org, and wl.mailspike.net zones because they are not blacklists. Because they are too aggressive to be widely useful the spam.dnsbl.sorbs.net and l2.apews.org zones are also excluded from the union.

HitsDNS Zone
81700(total number of IP addresses tested, including 145 at SDSC)
76835(union of most IP zones)
68455zen.spamhaus.org (union of all results)
67819b.barracudacentral.org
65627bl.mailspike.net (union of all results)
62980cbl.abuseat.org
62975zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
59979l2.apews.org
56414bl.tiopan.com
48414spam.dnsbl.sorbs.net
47705zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
46961hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
43464dnsbl-1.uceprotect.net
42267bl.mailspike.net (result 127.0.0.12 = bad reputation)
39737psbl.surriel.com
36580hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
35220db.wpbl.info
33856dnsbl.sorbs.net (union of all results)
31648dnsbl-2.uceprotect.net
29649bl.spameatingmonkey.net
26618all.spamrats.com (union of all results)
26504dnsbl-3.uceprotect.net
23868dnsbl.inps.de
23064ubl.unsubscore.com
19986truncate.gbudb.net
18419bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
17969dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
17082all.spamrats.com (result 127.0.0.36 = dialup)
14234dnsbl.sorbs.net (result 127.0.0.10 = dialup)
13698dnsbl.sorbs.net (result 127.0.0.6 = spam source)
12969bl.spamcop.net
10275ips.backscatterer.org
9337all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
9179bl.score.senderscore.com
7015ix.dnsbl.manitu.net
6616wl.mailspike.net (union of all results) (not a blacklist!)
6561zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6408list.dnswl.org (not a blacklist!)
5647hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5330bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
5142bl.mav.com.br
4805bl.mailspike.net (result 127.0.0.11 = very bad reputation)
4108wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3192hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2839all.s5h.net
2637hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2214spamsources.fabel.dk
1776tr.countries.nerd.dk
1677wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1643bl.spamcannibal.org
1510hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
994free.v4bl.org
795accredit.habeas.com (not a blacklist!)
793hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
731wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
657query.bondedsender.org (not a blacklist!)
564zen.spamhaus.org (union of SBL and SBLCSS results)
492zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
479mail-abuse.blacklist.jippg.org
363korea.services.net
288all.spamrats.com (result 127.0.0.38 = spam source)
254iadb.isipp.com (not a blacklist!)
240l2.bbfh.ext.sorbs.net
147dnsbl.ahbl.org (union of all results)
136iadb2.isipp.com (not a blacklist!)
102dnsbl.ahbl.org (result 127.0.0.4 = spam source)
100wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
72zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
56dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
56dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
56dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
48tor.dnsbl.sectoor.de (union of all results)
47tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
29dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
16dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
11multi.surbl.org
8dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4dnsbl-0.uceprotect.net
4spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
4spamguard.leadmon.net (union of all results)
3wadb.isipp.com
2hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1multi.uribl.com (union of all results)
Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
81700(total number of IP addresses whose names were tested, including 145 at SDSC)
45570hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
34298hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
20212l1.apews.org
7173hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2630(union of most domain zones)
2607hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
909dbl.spamhaus.org (result 127.0.1.2 = spam source)
909dbl.spamhaus.org (union of all results)
906hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
844hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
308hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
228hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
122hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
93fresh.spameatingmonkey.net
91dob.sibl.support-intelligence.net
87multi.surbl.org
66multi.uribl.com (result 127.0.0.2 = spam resource)
66multi.uribl.com (union of all results)
62hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
34urired.spameatingmonkey.net
34rhsbl.ahbl.org
Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
76731(total number of domains tested, including 106 at SDSC)
65428hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3578hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3504(union of most domain zones)
2549hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2500dbl.spamhaus.org (union of all results)
2496dbl.spamhaus.org (result 127.0.1.2 = spam source)
1783multi.surbl.org
1610hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1532hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1530multi.uribl.com (union of all results)
1514multi.uribl.com (result 127.0.0.2 = spam resource)
1348hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
442l1.apews.org
420dob.sibl.support-intelligence.net
388fresh.spameatingmonkey.net
222hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
139urired.spameatingmonkey.net
25rhsbl.ahbl.org
23hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
13multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
13hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
7hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
5ex.dnsbl.org
4dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 18 June 2013.